1. Best radiograph to view relationship of adjacent anatomical structures to impacted mandibular toothLateral cephalogramOPGCBCTIOPAQuestion 1 of 20 2. The angle at which the operator should stand from x ray tube for safety45-90 degree150-185 degree90-135 degree135-180 degreeQuestion 2 of 20 3. Sharpness of image is increased bySmall focal spotEgg shell effectIncreased object to receptor distanceLow miliamperageQuestion 3 of 20 4. Discoid lupus erythematosus has all of the following characteristics except one. Which one is the exception?Predominately affects middle-aged womenInvolves damage to the heart and kidneyProduces oral lesions that resemble erosive lichen planusAffects the skin of the face and scalpQuestion 4 of 20 5. which type of radiation effect results in radiation induced thyroid cancerautosomalsomaticteratogenicgeneticQuestion 5 of 20 6. sunburst appearance on radiograph is seen inosteopetrosisosteofibromax ray chestosteosarcomaQuestion 6 of 20 7. In bitewing method of radiography, for examination of maxillary deciduous lateral incisor, vertical angulation should be30201060Question 7 of 20 8. Radiotherapy is not used inMucoepidermoid carcinomaPaget diseaseSpindle cell carcinomaSquamous cell carcinomaQuestion 8 of 20 9. Elongation (the most common error) can be caused byAll of the aboveThe occlusal plane is not parallel to the floorToo little vertical angulationThe film is not parallel to the long axisQuestion 9 of 20 10. digital radiography differs from conventional inrays other than x rays are usedno hard copy is formedradiation receptors are differentx rays not usedQuestion 10 of 20 11. Fastest X-ray filmECDFQuestion 11 of 20 12. half value layer refers tothe thickness of a substance required to reduce the number of x ray photons by halfthe rate at which an x ray photon transfer its energy to irradiated matterthe time taken for x ray photons to travel half of the distance from the source to the objectthe heel effect seen when the anode is placed at an angle to the electron stream in the x ray cathode tubeQuestion 12 of 20 13. When using a phosphor plate, if we tak eimage without deetion of previous one is calledNo imageGhost imageDouble imageSingle real imageQuestion 13 of 20 14. Bremsstrahlung radiation results from ____.L shell electrons falling into the K shellX-rays interacting with electronsElectrons interacting with tungsten nucleiElectrons interacting with electronsQuestion 14 of 20 15. phosphorus-32 emitsalpha particlesbeta particlesneutronsx raysQuestion 15 of 20 16. Radiographic appearance of hypophosphatasiaShell teethGhost teethFloating teethCemental thickeningQuestion 16 of 20 17. Proper radiographic infection control includes all of the following except one. Which one is the exception?Sterilizing film packetsDisinfecting x-ray machine surfaceWearing gloves while making radiographsCovering working surfaces with barriersQuestion 17 of 20 18. If exposure is doubled but tube current and voltage remains constant thenProton energy is doubleNumber of protons is doubledMaximum energy is doubleMean energy is doubleQuestion 18 of 20 19. a developer at high temperature will causevery light imageclear white spots on the filmyellow stainsvery dark imageQuestion 19 of 20 20. in normal dental diagnostic procedures the principal radiation hazard to the operator is produced bygamma radiationprimary radiationsecondary radiationnone of the aboveQuestion 20 of 20 Loading...
